1. The ornamental design for a travel cooler and warmer top portion, as shown and described.

Description:

FIG. 1 is a perspective view from the front-top-right side of the travel cooler and warmer top showing our new design;

FIG. 2 is a front view of the design shown in FIG. 1;

FIG. 3 is a rear view of the design shown in FIG. 1;

FIG. 4 is a left side view of the design shown in FIG. 1;

FIG. 5 is a right side view of the design shown in FIG. 1; and,

FIG. 6 is a top view of the design shown in FIG. 1.

The broken lines immediately adjacent the shaded areas represent the bounds of the claimed design while all other broken lines are for illustrative purposes only; the broken lines form no part of the claimed design.